Question

find the 6th term of an Ap : 115 , 100 , 85... also find S​

Answer 1

Answe: =6+(16−1)7=111.

Explain :

Given,

a=6

d=13−6=7

T

n

=a+(n−1)d

216=6+(n−1)7

∴n=31

If n is odd then the middle term is

2

n+1

Middle term, =

2

31+1

=16

T

16

=6+(16−1)7=111.

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